Most people with color vision deficiency can see colors, but they have difficulty differentiating between the following colors: 1  particular shades of reds and greens (most common) 2  blues and yellows (less common)
This article describes how to update the expiration date of a key with PGP Command Line. The expiration date of your key can be updated if the key has a specified expiration date. You can update the expiration date, the number of days, or remove the expiration date for your PGP key. When specifying the date for the key to expire, the date format is yyyy-mm-dd. Note: < 1 user> is the user ID, portion of the user ID, or the key ID of the key whose expiration date is being removed. < 2 pass> is the passphrase of the key.  Use the following commands to update the expiration date of your PGP key.
Examples. 1  PGP is generally considered an example of strong cryptography, with versions running under most popular operating systems and on various hardware platforms. The open source standard for PGP operations is OpenPGP, and GnuPG is an implementation of that standard from the FSF.